It was noted that this material, which could also be denoted by (Bi12O14)2(Bi2Mo10O41), was a pure oxide-anion conductor. It could be considered as being the first member of a series of Bi-based mono-dimensional oxide-anion conductors with a skeleton that was built upon [Bi12O14]x columns. In order to alter its electrical behavior, substitutions were made at the Bi and Mo sites. The dopants were Pb, Ca, Sr and Ba for Bi sites, and P or W for Mo sites. Solid solutions of the form, Bi26-xMxMo10O69-x/2 (where M was Pb, Ca, Sr or Ba), Bi26Mo10-xPxO69-x/2 and Bi26Mo10-xWxO69-x/2, were characterized. The substitution ratio at the Bi site was systematically limited to 2; thus indicating that the Bi atoms which were located in the columns were not affected. In general, the introduction of O vacancies into the parent compound led to a small impairment of performance. However, the performance was considerably enhanced by the partial replacement of Mo by W.

A New Class of Mono-Dimensional Bismuth-Based Oxide Anion Conductors with a Structure Based on [Bi12O14] Columns. R.N.Vannier, S.Danze, G.Nowogrocki, M.Huve, G.Mairesse: Solid State Ionics, 2000, 136-137, 51-9